What do hair follicles form as they extend down into the dermis?

Hair follicles form a tube-like structure as they extend down into the dermis. This tubular shape is essential because it allows the hair strand to grow and emerge from the surface of the skin. The follicle serves as an anchor for the hair and is involved in the proliferation and differentiation of hair cells.

Within this tube, a specialized environment supports various functions, including the growth cycle of the hair. Surrounding the hair follicle are sebaceous glands, which secrete oils that help keep the hair and scalp moisturized, but they are not part of the hair follicle structure itself. Instead, the tubular design of the hair follicle is a key feature that distinguishes it from other skin structures, ensuring proper hair formation and growth.